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	STRESS-STRAIN RELATIONSHIPS AND NONLINEAR MOHR STRENGTH CRITERIA OF FROZEN SANDY CLAY
	Lai Yuanming; Gao Zhihua; Zhang Shujuan; Chang Xiaoxiao
发表日期	2010
ISSN	0038-0806
起始页码	45
结束页码	53
卷号	50 期号:1
英文摘要	A series of triaxial compressive tests were performed on frozen sandy clay at 4 and 6 C under confining pressures from 0 to 18 MPa. The experimental results indicate that the stress-strain curves show strain softening and hardening phenomena when the confining pressures are below and above 3.0 MPa, respectively. Since the generally hyperbolic model can not describe the strain hardening behavior very well and the Duncan-Chang model can not ideally describe the strain softening behavior of the frozen sandy clay, an improved Duncan-Chang model is proposed. This model can describe not only the strain softening behavior but also the strain hardening behavior of the frozen sandy clay, and the calculated results are rather coincident with the corresponding experimental data. In addition, it is also suitable for frozen silty clay with a high precision. Due to pressure melting, the shear strength of the frozen sandy clay changes nonlinearly with increasing confining pressures. In order to solve the problem that the linear Mohr-Coulomb criteria can not exactly reflect the shear strength of the frozen sandy clay, a nonlinear Mohr criteria of the frozen sandy clay is presented. The calculated results illustrate that it has higher precision and can describe the shear strength of frozen sandy soils more accurately than the linear Mohr-Coulomb criteria does.
英文关键词	frozen clay; improved Duncan-Chang model; nonlinear Mohr strength criteria; stress-strain relationship (IGC: D6)
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS关键词	BEHAVIOR ; SOILS
WOS记录号	WOS:000277878400004
来源期刊	SOILS AND FOUNDATIONS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239528
作者单位	[Lai Yuanming; Gao Zhihua; Zhang Shujuan; Chang Xiaoxiao] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Beijing 100864, Peoples R China
推荐引用方式 GB/T 7714	Lai Yuanming,Gao Zhihua,Zhang Shujuan,et al. STRESS-STRAIN RELATIONSHIPS AND NONLINEAR MOHR STRENGTH CRITERIA OF FROZEN SANDY CLAY[J],2010,50(1).
APA	Lai Yuanming,Gao Zhihua,Zhang Shujuan,&Chang Xiaoxiao.(2010).STRESS-STRAIN RELATIONSHIPS AND NONLINEAR MOHR STRENGTH CRITERIA OF FROZEN SANDY CLAY.SOILS AND FOUNDATIONS,50(1).
MLA	Lai Yuanming,et al."STRESS-STRAIN RELATIONSHIPS AND NONLINEAR MOHR STRENGTH CRITERIA OF FROZEN SANDY CLAY".SOILS AND FOUNDATIONS 50.1(2010).